How to spot bad RV moldings - California RV Specialists

Moldings are a critical part of your RV’s structure, not just for aesthetics, but for protecting your RV from the elements.

In this article and video, we’ll show you how to spot bad RV moldings, explore common issues that can arise, and teach you how to check if they need to be replaced. Understanding the condition of your insert moldings will help you maintain your RV’s integrity and prevent costly repairs down the line.

What are RV insert moldings?

Insert moldings are strips or pieces of material used to cover the seams between the RV’s exterior panels, providing a clean, finished look while also serving as a sealant against water, dirt, and other elements. They’re typically made from materials like rubber, plastic, or vinyl and are installed around windows, doors, and other edges to provide protection.

Common issues with RV moldings

Cracking and drying out

Over time, moldings can start to crack, split, or dry out due to UV exposure, weather changes, or aging materials. When this happens, they can no longer provide the proper seal, leading to leaks or air infiltration.

Loose or missing pieces

Loose moldings can result from improper installation or wear and tear over time. A piece may come loose, or you may notice small gaps where the molding has pulled away from the surface.

Discoloration or staining

Moldings are exposed to various elements like dirt, rain, and UV rays. Over time, you may notice staining or discoloration. This not only affects the appearance of your RV but can indicate material degradation.

Water damage

If moldings are no longer properly sealing the seams, water can penetrate the RV’s walls and cause serious damage like rotting wood or mold growth inside. Always inspect moldings for any signs of water damage around windows and doors.

How to check if your RV moldings need replacement

Inspect for cracks or splits

Examine the moldings around windows, doors, and seams closely. Look for any cracks, gaps, or tears that might allow water or air to enter. If the molding is cracked beyond repair, it’s time for a replacement.

Check for softness or flexibility

Moldings that are supposed to be rigid (especially around doors and windows) can lose their integrity and become soft or brittle with age. If the molding feels spongy or bends easily when you press on it, it may need to be replaced.

Look for water stains or leaks

Water damage often starts at the seams, so look for any water stains or signs of leakage around the moldings. If you find discoloration, bubbling, or peeling paint, it’s a sign that moisture has gotten past the molding and that it’s no longer providing a proper seal.

Test for secure fitting

Gently tug or press on the molding to ensure it’s still securely attached. Loose moldings can allow dirt and moisture to get in. If it comes loose easily or has obvious gaps, it’s time to replace it.

Examine for discoloration or fading

Moldings can discolor over time due to sun exposure. While some fading is normal, significant color changes or stains could indicate that the molding’s protective properties have been compromised, making it less effective.

What to do if you spot bad moldings

Replace the molding

If the molding is significantly damaged or degraded, replacement is the best option. Be sure to match the exact size, style, and material of the existing molding for a proper fit.

Reinstall loose moldings

If the molding is only slightly loose, you can usually reattach it with an RV-safe adhesive or replace the fasteners. Ensure the new attachment is secure to avoid further issues.

Seal any gaps

If you notice small gaps between the molding and the RV surface, you can use silicone sealant or another appropriate RV sealant to fill the gaps and restore the seal.

Preventive maintenance tips for RV moldings

Regularly inspect moldings

Make it a habit to inspect the moldings during routine RV checks. Catching problems early can prevent bigger issues like water damage or leaks.

Clean moldings regularly

Keep your moldings clean from dirt and debris. Use a gentle cleaner and avoid abrasive materials that could damage the surface. Keeping them clean will help preserve their flexibility and appearance.

Use UV protectants

Applying a UV protectant to your moldings can help extend their lifespan by preventing them from drying out or cracking due to sun exposure.

Store your RV properly

When not in use, store your RV in a shaded or covered area to protect the moldings from the damaging effects of prolonged sun exposure.

Final thoughts

Regularly inspecting your RV’s insert moldings can prevent costly repairs down the line and ensure that your RV stays protected from the elements. Cracked, loose, or damaged moldings can lead to serious issues like water damage, so don’t overlook their condition. With the right maintenance and timely replacement, your RV’s moldings can keep it in great shape and protect your investment for years to come.

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